Junior Witter believes he is in the best form of his career as he prepares for a mandatory defence of the WBC world light-welterweight title against the American Tim Bradley at The Trent FM Arena, Nottingham on May 10.

Witter, who is training in Gran Canaria, will be making his third defence and fighting for the first time since a dramatic seventh-round stoppage of the former champion Vivian Harris in September.

"The Harris fight was the best of my career and it has raised the expectations of me," said Witter, who needed surgery after it for a left knee-ligament injury. Bradley, 24, from Palm Springs, California, is undefeated in 21 contests and is 10 years Witter's junior.